from abaqusConstants import *
from .Constraint import Constraint
from ..Region.Region import Region
[docs]class Tie(Constraint):
"""The Tie object defines two surfaces to be tied together for the duration of a
simulation.
The Tie object is derived from the ConstrainedSketchConstraint object.
Attributes
----------
suppressed: Boolean
A Boolean specifying whether the constraint is suppressed or not. The default value is
OFF.
Notes
-----
This object can be accessed by:
.. code-block:: python
import interaction
mdb.models[name].constraints[name]
The corresponding analysis keywords are:
- TIE
"""
# A Boolean specifying whether the constraint is suppressed or not. The default value is
# OFF.
suppressed: Boolean = OFF
def __init__(self, name: str, main: Region, secondary: Region, adjust: Boolean = ON,
positionToleranceMethod: SymbolicConstant = COMPUTED, positionTolerance: float = 0,
tieRotations: Boolean = ON, constraintRatioMethod: SymbolicConstant = DEFAULT,
constraintRatio: float = 0, constraintEnforcement: SymbolicConstant = SOLVER_DEFAULT,
thickness: Boolean = ON):
"""This method creates a Tie object.
Notes
-----
This function can be accessed by:
.. code-block:: python
mdb.models[name].Tie
Parameters
----------
name
A String specifying the constraint repository key.
main
A Region object specifying the name of the main surface.
secondary
A Region object specifying the name of the secondary surface.
adjust
A Boolean specifying whether initial positions of tied secondary nodes are adjusted to
lie on the main surface. The default value is ON.
positionToleranceMethod
A SymbolicConstant specifying the method used to determine the position tolerance.
Possible values are COMPUTED and SPECIFIED. The default value is COMPUTED.
positionTolerance
A Float specifying the position tolerance. The *positionTolerance* argument applies only
when *positionToleranceMethod*=SPECIFIED. The default value is 0.0.
tieRotations
A Boolean specifying whether rotation degrees of freedom should be tied. The default
value is ON.
constraintRatioMethod
A SymbolicConstant specifying the method used to determine the constraint ratio.
Possible values are DEFAULT and SPECIFIED. The default value is DEFAULT.
constraintRatio
A Float specifying the fractional distance between the main reference surface and the
secondary node at which the translational constraint should act. The *constraintRatio*
argument applies only when *constraintRatioMethod*=SPECIFIED. The default value is 0.0.
constraintEnforcement
A SymbolicConstant specifying the discretization method. Possible values are
SOLVER_DEFAULT, NODE_TO_SURFACE, and SURFACE_TO_SURFACE. The default value is
SOLVER_DEFAULT.
thickness
A Boolean specifying whether shell element thickness is considered. The default value is
ON.
Returns
-------
A Tie object.
"""
super().__init__()
pass
[docs] def swapSurfaces(self):
"""This method switches the main and secondary surfaces of a tied constraint. This command
is valid only during the step in which the interaction is created.
"""
pass
[docs] def setValues(self, adjust: Boolean = ON, positionToleranceMethod: SymbolicConstant = COMPUTED,
positionTolerance: float = 0, tieRotations: Boolean = ON,
constraintRatioMethod: SymbolicConstant = DEFAULT, constraintRatio: float = 0,
constraintEnforcement: SymbolicConstant = SOLVER_DEFAULT, thickness: Boolean = ON):
"""This method modifies the Tie object.
Parameters
----------
adjust
A Boolean specifying whether initial positions of tied secondary nodes are adjusted to
lie on the main surface. The default value is ON.
positionToleranceMethod
A SymbolicConstant specifying the method used to determine the position tolerance.
Possible values are COMPUTED and SPECIFIED. The default value is COMPUTED.
positionTolerance
A Float specifying the position tolerance. The *positionTolerance* argument applies only
when *positionToleranceMethod*=SPECIFIED. The default value is 0.0.
tieRotations
A Boolean specifying whether rotation degrees of freedom should be tied. The default
value is ON.
constraintRatioMethod
A SymbolicConstant specifying the method used to determine the constraint ratio.
Possible values are DEFAULT and SPECIFIED. The default value is DEFAULT.
constraintRatio
A Float specifying the fractional distance between the main reference surface and the
secondary node at which the translational constraint should act. The *constraintRatio*
argument applies only when *constraintRatioMethod*=SPECIFIED. The default value is 0.0.
constraintEnforcement
A SymbolicConstant specifying the discretization method. Possible values are
SOLVER_DEFAULT, NODE_TO_SURFACE, and SURFACE_TO_SURFACE. The default value is
SOLVER_DEFAULT.
thickness
A Boolean specifying whether shell element thickness is considered. The default value is
ON.
"""
pass